Influence of soil pollution by fluorides and sulfites on grown parameters of some flowery-decorative plants (p. )
AbstractSoil pollution in industry regions causes a significant negative effect on living organisms, and, particularly, on plants, that leads to decreasing of their physiologically-biochemical processes, grown, development and productivity. At the same time, plants play an important sanitary-hygienically role in industrial regions. However, plant species differently affected by pollution of environment. That is why researching of their reactions is important and aimed to determine resistance mechanisms and resistant species assortment. It should be mentioned that action of soil pollution on plants by fluorides and sulfites that is common for plants produces phosphoric acid, phosphates and phosphate additives, is not well studied.In this regard influence of soil pollution by sodium fluoride and sodium sulfite on grown of aboveground parts and root systems of eight flowery-decorative grassy plants, common in Donetsk greening, was studied. Studies were made according to the full double factor experiment with three factors levels. Concentrations of pollutants were: fluoride – 0,100 and 200 mg/kg (calculated as F-), sulfites – 0,1 and 2 g/kg (calculated as S2-). During the removal of the experiment (after thirty days of cultivation) were measured length of aerial parts (from the root collar to terminal bud) and root systems (from the root collar to the top of the main root). The results are statistically processed by variance analysis and Dannet medium comparison. It was established, that in Ageratum houstonianum cv. Blue Lagoon and Linum usitatissimum L. seedlings soil pollution by fluorides and sulfites does not cause reliable changes in the stem and root length. In some variants this plants showed tendency of grown intensifying, and complex pollution by 200 mg/kg of sodium fluoride and 2 g/kg of sodium sulfite caused 79,8 % intensification of aboveground part length in Linum usitatissimum L.In Atnplex hortensis L., Cosmos sulphureus Cav. and Petunia Hybrida Grandiflora L. grown on polluted soil occurs significant (on 5,1–35,3 %) oppression of roots grow and at the same time on the grow of aboveground parts contamination does not make reliable effect.Significant decreasing of steam (on 17,4–63,8 %) and root systems (on 19,8–91,2 %) length comparing to control occurred in Dahlia variabilis and Calendula officinalis L.As the result, the most resistant to ftoride and sulfite soil contamination are Ageratum houstonianum cv. Blue Lagoon and Linum usitatissimum L. and it is possible to recommend them to use in greening of contaminated territories.
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